Hostname

sfn.cn

Last fetched Mon, 06 Jul 2026 11:09:36 GMT

sfn.cn resolves to 1 IPv4 address operated by AS7497 in CN. WHOIS lists registrar:北京国科云计算技术有限公司（原北京中科三方网络技术有限公司） as the registrar.

Nutrition Label

Resolution chain

sfn.cn resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IP	Prefix	ASN	Operator	Country
210.72.13.177	210.72.13.0/24	AS7497	—	CN

WHOIS identity

Registrar

registrar:北京国科云计算技术有限公司（原北京中科三方网络技术有限公司）

Organization

??????????????

Contact emails

Subdomains

22 observed subdomains of sfn.cn.

Subdomain
cloud.sfn.cn
dc.sfn.cn
imap.sfn.cn
login.sfn.cn
m.sfn.cn
ma.sfn.cn
mail.sfn.cn
manager.sfn.cn
mx.sfn.cn
ns1.sfn.cn
ns2.sfn.cn
pop.sfn.cn
rdap.sfn.cn
smtp.sfn.cn
tool.sfn.cn
www.sfn.cn

Showing 16 of 22. View all subdomains →

Web-graph footprint

Distinct hostnames that link to or from sfn.cn in the public web crawl.

145 sites link to this hostname.

1 site linked to from this hostname.

Sample inbound links

Sample outbound links

guokeyun.com

Threat posture

History

Mail and authentication

MX records

mail.sfn.cn

SPF policy

1 SPF mechanism authorising senders for sfn.cn.

Mechanism	Target
SPF_INCLUDE	spf.icoremail.net

Pivot deeper into the graph from sfn.cn.

Cypher and MCP

Reproduce the resolution chain directly against graph.whisper.security:

MATCH (h:HOSTNAME {name: "sfn.cn"})-[:RESOLVES_TO]->(ip:IPV4)
      -[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)
      -[:ROUTES]->(asn:ASN)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, asn.name AS asn, n.name AS operator
LIMIT 20

Or query Whisper from your own LLM workflow via the Whisper MCP server.